Colossal Titan (Hell)

Colossal. The titan is too big for a typical HP calculation. It has several hellfire generators (weak-points) spread around it: 1 for each limb. These generators protect the Titan's head, and allow its massive limbs to function. Each generator has 100 hp, and they must all be destroyed in order to immobilize the titan and expose its head.

Arms: The weak-points in the Arms are responsible for the creature's swipe attacks. Each arm is 100 ft. in length when running up, and the generators are nestled under the traps of the titan. Destroying one gets rid of one swipe attack, destroying both gets rid of both.

Legs: The weak-points in the legs are responsible for its movement, stability, and dust cloud lair action. Each leg is 150 ft. in length when climbing up, but the generators are nestled behind the knees about 75 ft. in the air. Destroying one of them lowers the DC of its reflexive movement to 14, and its dust cloud to 7. Destroying both means the titan is immobilized and cannot cause its Dust Cloud.

Head: The generator in the skull of the Titan, once exposed, is responsible for the Titan's continued existence, and combat ends if it is destroyed.

Once the four generators are destroyed, the Head is basically just there for style points to end the fight.

Multiattack. The titan makes two Swipe attacks. If it takes 100 damage to one of its arm generators, it loses one of these attacks.

Swipe. Melee Weapon Attack. Range 100/20 ft cube. Each creature targeted by a swipe must make a DC 19 DEX saving throw or take 31 (6d6+10) bludgeoning damage, half as much on a success. If the target fails by 5 or more, they are captured by the hand and grappled and restrained (DC 20 to escape).

Steam Burst. (Recharge 6) Ranged Attack. A torrent of steam bursts from the skin of the titan. Each creature within 100 ft. of the titan must make a DC 19 STR saving throw. On a failure, a creature is thrown 60 ft. back and takes 63 (18d6) Fire Damage. On a success, they take half as much and are not thrown.

Reflexive Movement. When an enemy approaches one of the generators, the Titan uses its movement and its other limbs to try to avoid the approach and bat away the enemy. The approaching enemy must make a DC 19 DEX saving throw or take 15 bludgeoning damage and be knocked 60 ft away. Once a creature makes it within 30 ft. of a generator, they are immune to the effect of this reaction.

Colossal Effects.

The immense scale of the Titan causes these residual effects surrounding it as it fights. One of these takes place each round on initiative 20, winning ties.

Dust Cloud. As the titan walks, dust and debris is kicked up from the ground around them. Creatures within 200 ft. of the Titan must make a DC 14 CON save or be blinded. Creatures within 50 ft. of the Titan are immune to this effect.

Debris. The amount of hell energy being consumed by the Titan to function cause debris to fly around it like meteors. Each creature within 400 ft. of the titan must make a DC 14 DEX save or take 22 (5d8) bludgeoning damage, no damage on a success. Creatures within 100 ft. of the Titan are immune to these effects.

Toxic Cloud. The exhaust coming from the hellfire generators on the Titan release a toxic mist that permeates the surrounding air. Creatures within 200 ft. of the Titan must make DC 14 CON saves or be poisoned until the end of their next turn.